(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

Give three examples for leavers of the third order.

Which class of lever found in the human body is being used by a boy when he holds a load on the palm of his hand.

Which class of lever found in the human body is being used by a boy when he raises the weight of his body on his toes?

The following belong to which class of lever?

The Physical balance

The following belong to which class of lever?

A see-saw

The following belong to which class of lever?

An oar of a boat

The following belong to which class of lever?

Human-arm

The following belong to which class of lever?

Pliers Tools

The following belong to which class of lever?

A claw-hammer

The following belong to which class of lever?

Rowing of a boat

The following belong to which class of lever?

A fire tongs

The following belong to which class of lever?

Sugar tongs

The following belong to which class of lever?

A pair of scissors

The following belong to which class of lever?

Wheelbarrow

The following belong to which class of lever?

Nutcracker

The following belong to which class of lever?

Knife

The following belong to which class of lever?

Fore-arm

Shears, used for cutting metals and scissors used for cutting clothes are both examples of levers of the first order. However, whereas the shears always have short blades and long handles, the scissors often have blades much longer than the handles. Explain, why this is so?

The following are an example of levers. State the class of lever to which each one belongs giving the relative positions of Load (L), Effort (E), Fulcrum (F):
(i) Scissors (ii) Sugar tongs (iii) Nutcracker (iv) Pliers.

Draw a labelled sketch of a second class lever. Give one example of such a lever.